How to operate in Crewbux,

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Dear Mylottors, Yesterday, I came across a post here mentioning the Crewbux and I tried to sign up there but then when I began to click I found that the rate of my successful cliks was very low that's to say I kicked several times but only one even 0 time was recorded besides the site wss always too full to get in. I don't know this is because I operated it in a wrong way or just because of the site's own problem. Would any expert kindly explain it to me ??? Tks!